VASTBLS

VASTBLS is a binary file that holds the current calibration values of the temperature, brightness and radiance for all 12 channels of GOES AA satellite data. Its fixed size is 1622016 words.

Word allocation for the file

The primary blocks for VASTBLS are shown below. Each block represents a table of calibrated values for each raw value.

Word

Description

0 - 540671

radiance calibration block (watts/meter**2/steradian*1000)

540672 - 1081343

temperature calibration block, in Kelvin

1081344 - 1622015

brightness calibration block, 0 to 255

Word allocation for the primary segment

Each primary segment contains secondary segments (12 maximum) allocated by band number. Word addresses are relative to the start of the primary segment.

Word

Description

0 - 45055

band 1 block

45056 - 90111

band 2 block

90112 - 135167

band 3 block

135168 - 180223

band 4 block

180224 - 225279

band 5 block

225280 - 270335

band 6 block

270336 - 315391

band 7 block

315392 - 360447

band 8 block

360448 - 405503

band 9 block

405504 - 450559

band 10 block

450560 - 495615

band 11 block

495616 - 540671

band 12 block

Word allocation for the secondary segment

Each secondary segment contains base segments allocated by the Delta-F value. This value ranges from -5 to +5, providing 11 base segments per secondary segment. Each of the word addresses below is relative to the start of the secondary segment. The values are the actual numbers used to calibrate the data.

Word

Description

0 - 4095

Delta-F = -5

4096 - 8191

Delta-F = -4

8192 - 12287

Delta-F = -3

12288 - 16383

Delta-F = -2

16384 - 20479

Delta-F = -1

20480 - 24575

Delta-F = 0

24576 - 28671

Delta-F = +1

28672 - 32767

Delta-F = +2

32768 - 36863

Delta-F = +3

36864 - 40959

Delta-F = +4

40960 - 45055

Delta-F = +5

API functions

Currently, no API library functions exist for reading and writing this file.